Automatic row alignment mechanism for corn harvester header

Abstract

The present invention relates to an automatic row-aligning mechanism for a corn harvester header, which belongs to the technical field of corn harvester headers; the mechanism comprises a harvester body, a header is installed at the front end of the harvester body, a first seat, a second seat and a third seat are slidingly arranged inside the header, a drive shaft is rotatably arranged inside the header, the first seat, the second seat and the third seat are all screwed on different threaded sections of the drive shaft; the first seat, the second seat and the third seat all comprise a base, two left-right symmetrical connecting plates are slidingly arranged on the bases of the first seat and the second seat, a connecting plate is fixedly arranged on the base of the third seat, and a group of chains is arranged on each connecting plate; the two connecting plates inside the first seat are driven to approach or move away from each other by the first driving mechanism, and the two connecting plates inside the second seat are driven to approach or move away from each other by the second driving mechanism; the problem that the current front header of the corn harvester is difficult to adapt to the wide and narrow row planting mode is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of corn harvester headers, and particularly relates to an automatic row alignment mechanism for a corn harvester header. Background Art

[0002] As agricultural production gradually moves towards a highly mechanized and intelligent environment, corn harvesters, as key agricultural equipment, have been widely used in major corn-producing regions around the world, significantly improving corn harvesting efficiency and alleviating the burden of manual labor. To further enhance operational precision and automation, current corn harvesters are commonly equipped with advanced sensor systems. Vision sensors leverage image recognition technology to capture the position and growth status of corn plants in real time, providing the harvester with intuitive visual information. Laser sensors precisely measure the distance between the harvester and corn plants by emitting and receiving laser beams, with millimeter-level accuracy. Ultrasonic sensors utilize the principle of sound wave reflection to effectively detect obstacles and crop row positions in complex field environments. Working together, these sensors assist the harvester in achieving automatic row alignment, enabling the header to precisely align with the corn rows, reducing operator error and significantly improving the accuracy and automation of harvesting operations, significantly enhancing efficiency and quality.

[0003] Currently, corn planting methods are mainly divided into equal-spaced planting and wide-narrow row planting. Equal-spaced planting facilitates field management and mechanical operations, but the plants compete more fiercely for resources like light and nutrients. Wide-narrow row planting is a more scientific and rational planting method. By setting alternate wide and narrow row spacing, each row of corn is fully exposed to sunlight, providing good ventilation and light transmission, which is conducive to photosynthesis and thus increases corn yield. According to relevant agricultural research data, using wide-narrow row planting can increase corn yield by 10%-20% compared to equal-spaced planting.

[0004] However, existing corn harvester front headers are poorly designed to accommodate wide- and narrow-row cropping patterns. Most headers have fixed, evenly spaced reapers, typically designed based on the row spacing of evenly spaced crops. When faced with wide- and narrow-row cropping, inconsistent row spacing creates a cascade of problems. For example, in narrow-row areas, fixed-pitch reapers fail to closely follow the corn rows, leading to missed harvests and leaving some ears in the field, resulting in grain loss. Alternatively, during harvesting, reapers may mis-harvest corn plants in adjacent rows due to inaccurate alignment, compromising harvest quality. In wide-row areas, however, reapers cannot fully utilize the larger row spacing and must harvest at fixed intervals, reducing harvesting efficiency and increasing operation time. This mismatch between header design and wide- and narrow-row cropping patterns severely restricts the effectiveness of corn harvesters in these areas, hindering further improvements in agricultural production efficiency. Therefore, it is urgent to develop an automatic row alignment mechanism for corn harvester headers that can adapt to wide and narrow row planting. This is of great significance for promoting the development of agricultural mechanization and improving corn harvesting efficiency and quality. Summary of the Invention

[0005] The present invention overcomes the deficiencies of the prior art and proposes an automatic row alignment mechanism for a corn harvester header; it solves the problem that the current corn harvester front header is difficult to adapt to the wide and narrow row planting mode.

[0006] In order to achieve the above object, the present invention is implemented through the following technical solutions.

[0007] A corn harvester header automatic row alignment mechanism includes a harvester body, a header is installed at the front end of the harvester body, a first seat, a second seat and a third seat are slidably arranged inside the header, a drive shaft is rotatably arranged inside the header, a first rack and a second rack are fixedly arranged inside the header, and a first thread segment, a second thread segment and a third thread segment with different pitches are arranged on the outside of the drive shaft, wherein the first seat is screwed to the first thread segment, the second seat is screwed to the second thread segment, and the third seat is screwed to the third thread segment, the first seat, the second seat and the third seat all include a base, and the bases of the first seat and the second seat are all screwed to the first seat and the second seat. Two symmetrical connecting plates are slidingly arranged, a connecting plate is fixedly arranged on the base of the third seat, and a group of chains are arranged on each connecting plate; a first driving mechanism is arranged inside the first seat, and a second driving mechanism is arranged inside the second seat, the first driving mechanism is connected to the two connecting plates and the first rack inside the first seat, and the second driving mechanism is connected to the two connecting plates and the second rack inside the second seat; the two connecting plates inside the first seat are driven to move closer to or away from each other by the first driving mechanism, and the two connecting plates inside the second seat are driven to move closer to or away from each other by the second driving mechanism.

[0008] Furthermore, the cutting table is a U-shaped plate structure with a U-shaped opening facing forward, and a mounting groove is provided on the rear inner wall of the cutting table, and the drive shaft is rotatably arranged inside the mounting groove; the first rack and the second rack are both fixedly arranged on the rear inner wall of the cutting table, and the first rack and the second rack are both horizontally arranged along the left and right directions, and the pitch ratio of the first rack to the second rack is 14:53.

[0009] Furthermore, a motor is fixedly installed on the cutting table, and the output shaft of the motor is connected to the drive shaft; two first thread segments, two second thread segments and two third thread segments are provided on the drive shaft, the two first thread segments are symmetrically arranged at the middle of the drive shaft, the two second thread segments are symmetrically arranged at the left and right sides of the two first thread segments, and the two third thread segments are symmetrically arranged at the left and right sides of the two second thread segments; the two first thread segments have the same pitch and opposite rotation directions; the two second thread segments have the same pitch and opposite rotation directions; the two third thread segments have the same pitch and opposite rotation directions; the first thread segment and the second thread segment located on the same side have opposite rotation directions, and the second thread segment and the third thread segment located on the same side have the same rotation direction; the pitch ratio between the first thread segment, the second thread segment and the third thread segment is 7:53:9.

[0010] Furthermore, two first seats, two second seats and two third seats are slidingly arranged inside the cutting table, and the rear ends of the bases of the first seats, the second seats and the third seats are fixedly provided with a screw block. The screw blocks at the rear ends of the bases of the two first seats are screwed to the two first thread segments respectively, the screw blocks at the rear ends of the bases of the two second seats are screwed to the two second thread segments respectively, and the screw blocks at the rear ends of the bases of the two third seats are screwed to the two third thread segments respectively.

[0011] Furthermore, a sliding groove is respectively provided on the left and right sides of the base of the first seat and the second seat, and the connecting plates on the left and right sides are respectively slidably provided in the sliding grooves on both sides; a connecting cavity is provided inside the base, and the connecting cavity is connected with the sliding grooves on the left and right sides; sprockets are provided on both the front and rear sides of the upper end face of the connecting plate, and the chain is provided between the two sprockets; a folding rack is fixedly provided on the side where the two connecting plates are close to each other, and the folding racks are provided along the left and right directions, and the two folding racks are both extended into the connecting cavity of the base; a driven gear is rotatably provided inside the connecting cavity of the base, and the two folding racks are respectively located on the front and rear sides of the driven gear and are both engaged with the driven gear.

[0012] Furthermore, the left end of the folding rack on the front side of the base of the first seat is fixedly connected to the connecting plate on the left, and the right end of the folding rack on the rear side of the base of the first seat is fixedly connected to the connecting plate on the right; the right end of the folding rack on the front side of the base of the second seat is fixedly connected to the connecting plate on the right, and the left end of the folding rack on the rear side of the base of the second seat is fixedly connected to the connecting plate on the left.

[0013] Furthermore, the first driving mechanism is arranged inside the base of the first seat, and the first driving mechanism includes a first driving gear and a transmission gear; the first driving gear and the transmission gear are rotatably arranged inside the connecting cavity of the base of the first seat, and the driven gear and the first driving gear are respectively located on the front and rear sides of the transmission gear, and the first driving gear and the driven gear are both engaged with the transmission gear; the first driving gear is engaged with the first rack.

[0014] Furthermore, the second driving mechanism is arranged inside the base of the second seat, and the second driving mechanism includes a second driving gear, a large gear, and a small gear; the second driving gear, the large gear, and the small gear are rotatably arranged inside the connecting cavity of the base of the second seat, wherein the large gear is located above the small gear, and the large gear and the small gear are fixedly connected, and the gear ratio of the large gear and the small gear is 2:1; the second driving gear is located at the rear side of the large gear and meshes with the large gear, the driven gear is located at the front side of the small gear and meshes with the small gear, and the second driving gear is meshed with the second rack.

[0015] The cam is connected to the left and right sides of the base by a plurality of levers, and the lever is connected to the top of the base by a plurality of levers, and the lever is connected to the top of the base by a plurality of levers.

[0016] Furthermore, a fixing groove is provided on each side of the bases of the two third seats that are close to each other, and the connecting plate is fixedly provided inside the fixing groove, and sprockets are provided on both sides of the upper end face of the connecting plate, and the chain is provided between the two sprockets; a second cover body is fixedly provided on the outer side of the base of the third seat, and the front end of the second cover body is provided with a triangular structure, and an avoidance groove is provided on the side wall of the two second cover bodies that are close to each other, and the chain on the connecting plate on the base of the third seat extends to the outer side of the second cover body through the avoidance groove.

[0017] The beneficial effects of the present invention compared to the prior art are:

[0018] (1) Highly adaptable to wide and narrow row planting modes: With the help of the sensor system to accurately judge the planting mode, the motor drives the drive shaft to rotate, and then through the pitch ratio design of the first thread segment, the second thread segment and the third thread segment on the drive shaft, the first seat, the second seat and the third seat are driven to move at different distances, accurately adapting to the unequal row spacing in wide and narrow row planting, effectively solving the problem that traditional equidistant cutters are difficult to cope with wide and narrow rows, and greatly broadening the scope of application of corn harvesters.

[0019] (2) Significantly improve work efficiency: The automatic row adjustment process is fast and accurate, reducing harvesting pauses and repeated operations caused by inaccurate row alignment. In wide and narrow row planting areas, it can fully utilize the row spacing, speed up the harvesting speed, shorten the overall operation time, increase the harvesting area per unit time, and significantly improve the efficiency of corn harvesting operations.

[0020] (3) Significantly reduce grain losses: Precise row alignment avoids missed or wrong harvesting caused by misalignment between the harvesting platform and the corn row, ensuring that each row of corn can be effectively harvested. This greatly reduces the situation where corn ears are left in the field, reduces the grain loss rate, improves the integrity of the grain harvest, and increases the actual income of farmers.

[0021] (4) Optimize the adaptability of the header structure: During the movement of the first, second and third headers, a series of internal gear transmissions are used to achieve the following: the width of the first and second headers themselves are narrowed, and the distance between the first, second and third headers is narrowed, ensuring that they maintain a suitable distance from the wide and narrow rows of corn planting, so that they can operate stably and efficiently even in complex field environments, thereby improving the structural adaptability and stability of the header. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described in detail below with reference to the accompanying drawings:

[0023] Figure 1 It is a schematic structural diagram of the present invention as a whole;

[0024] Figure 2 It is a structural diagram of the header;

[0025] Figure 3 It is a schematic diagram of the connection between the drive shaft and the motor;

[0026] Figure 4 Schematic diagram of the connection between the base of the first seat and the second seat and the first cover;

[0027] Figure 5 This is a schematic diagram of the connection between the base and the connecting plate of the first and second seats;

[0028] Figure 6 is a structural diagram of the first cover;

[0029] Figure 7 is a schematic diagram of the connection between the first driving mechanism and the connecting plate;

[0030] Figure 8 This is a schematic diagram of the connection between the second drive mechanism and the connecting plate. Figure 1 ;

[0031] Figure 9 This is a schematic diagram of the connection between the second drive mechanism and the connecting plate Figure 2 ;

[0032] Figure 10 yes Figure 2 A partial enlarged schematic diagram of point A in the middle;

[0033] Figure 11 It is a schematic diagram of the connection between the base of the third seat and the second cover;

[0034] Figure 12 It is a planar schematic diagram of harvesting corn plants planted in an equal-spacing manner according to the present invention;

[0035] Figure 13 It is a plan view schematic diagram of harvesting corn plants in a wide-narrow row planting method according to the present invention;

[0036] Among them, 1 is the harvester body, 2 is the header, 3 is the first seat, 4 is the second seat, 5 is the drive shaft, 6 is the first thread segment, 7 is the second thread segment, 8 is the chain, 9 is the third thread segment, 10 is the third seat, 11 is the corn plant, 21 is the base, 22 is the first cover, 23 is the second cover, 31 is the connecting plate, 32 is the sprocket, 34 is the folding rack, 35 is the driven gear, 41 is the first driving gear, 42 is the second rack, 43 is the transmission gear, 44 is the first rack, 51 is the second driving gear, 52 is the large gear, 53 is the small gear, 61 is the side plate, 62 is the inclined plate, 63 is the top plate, 64 is the rear plate, and 65 is the triangular plate. DETAILED DESCRIPTION

[0037] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail with reference to the embodiments and the accompanying drawings. It should be understood that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the present invention. The technical solutions of the present invention will be described in detail below with reference to the embodiments and the accompanying drawings, but the scope of protection is not limited thereto.

[0038] like Figure 1As shown in —11, the present invention provides an automatic row-aligning mechanism for a corn harvester header, comprising a harvester body 1, a header 2 installed at the front end of the harvester body 1, a first seat 3, a second seat 4 and a third seat 10 slidingly arranged inside the header 2, a drive shaft 5 rotatably arranged inside the header 2, a first rack 44 and a second rack 42 fixedly arranged inside the header 2, a first thread segment 6, a second thread segment 7 and a third thread segment 9 with different pitches arranged on the outside of the drive shaft 5, wherein the first seat 3 is screwed to the first thread segment 6, the second seat 4 is screwed to the second thread segment 7, and the third seat 10 is screwed to the third thread segment 9, the first seat 3, the second seat 4 and the third seat 10 all include a base 21, and the first seat 3 and the second seat 4 are screwed to the third thread segment 9. Two left-right symmetrical connecting plates 31 are slidingly provided on the base 21 of the second seat 4, a connecting plate 31 is fixedly provided on the base 21 of the third seat 10, and a group of chains 8 are provided on each connecting plate 31; a first driving mechanism is provided inside the first seat 3, and a second driving mechanism is provided inside the second seat 4, the first driving mechanism is connected to the two connecting plates 31 and the first rack 44 inside the first seat 3, and the second driving mechanism is connected to the two connecting plates 31 and the second rack 42 inside the second seat 4; the first driving mechanism drives the two connecting plates 31 inside the first seat 3 to approach or move away from each other, and the second driving mechanism drives the two connecting plates 31 inside the second seat 4 to approach or move away from each other.

[0039] A sensor system is installed in the front middle of the harvester body 1, and the sensor system includes a visual sensor, a laser sensor and an ultrasonic sensor.

[0040] The cutting table 2 is a U-shaped plate-like structure with a forward-facing opening. A horizontal mounting slot is provided at the mid-height of the rear inner wall of the cutting table 2. The drive shaft 5 is rotatably mounted within the mounting slot. Both the first rack 44 and the second rack 42 are fixedly mounted on the rear inner wall of the cutting table 2. Both the first rack 44 and the second rack 42 are arranged horizontally in the horizontal direction and are located above the mounting slot. The pitch ratio of the first rack 44 to the second rack 42 is 14:53.

[0041] A motor is fixed to the header 2. The motor's output shaft is connected to the drive shaft 5 via a transmission mechanism, which drives the drive shaft 5 for rotation. The drive shaft 5 is provided with two first thread segments 6, two second thread segments 7, and two third thread segments 9. The two first thread segments 6 are symmetrically arranged in the middle of the drive shaft 5, the two second thread segments 7 are symmetrically arranged on either side of the two first thread segments 6, and the two third thread segments 9 are symmetrically arranged on either side of the two second thread segments 7. The two first thread segments 6 have the same pitch but opposite rotations; the two second thread segments 7 have the same pitch but opposite rotations; and the two third thread segments 9 have the same pitch but opposite rotations. The first and second thread segments 6 and 7 on the same side have opposite rotations, while the second and third thread segments 7 and 9 on the same side have the same rotation. The pitch ratio of the first, second, and third thread segments 6, 7, and 9 is 7:53:9.

[0042] Two first seats 3, two second seats 4, and two third seats 10 are slidably disposed within the header 2. A screw block is fixedly disposed at the rear end of the base 21 of each of the first, second, and third seats 3, 4, and 10. The screw blocks at the rear end of the base 21 of the two first seats 3 are screwed to the two first threaded segments 6, respectively. The screw blocks at the rear end of the base 21 of the two second seats 4 are screwed to the two second threaded segments 7, respectively. The screw blocks at the rear end of the base 21 of the two third seats 10 are screwed to the two third threaded segments 9. All of the screw blocks are slidably disposed within the mounting groove, with the outer walls of the screw blocks in sliding contact with the inner walls of the mounting groove.

[0043] The base 21 is a square block-shaped structure extending forward and backward. A sliding groove is provided on the left and right sides of the base 21 of the first seat 3 and the second seat 4, respectively. The connecting plates 31 on the left and right sides slide within the sliding grooves on both sides. A connecting cavity is provided within the base 21, which is connected to the sliding grooves on both sides. The connecting plates 31 are square plate-shaped structures extending forward and backward. Sprockets 32 are provided on both the front and rear sides of the upper end of the connecting plates 31, and the chain 8 is provided between the two sprockets 32. A folding rack 34 is fixedly provided on each side of the two connecting plates 31 that are close to each other. The folding racks 34 are arranged in the left and right directions and extend into the connecting cavity of the base 21. A driven gear 35 is rotatably provided within the connecting cavity of the base 21. The two folding racks 34 are located on the front and rear sides of the driven gear 35 and mesh with the driven gear 35. Among them, the left end of the folding rack 34 on the front side of the base 21 of the first seat 3 is fixedly connected to the connecting plate 31 on the left, and the right end of the folding rack 34 on the rear side of the base 21 of the first seat 3 is fixedly connected to the connecting plate 31 on the right; the right end of the folding rack 34 on the front side of the base 21 of the second seat 4 is fixedly connected to the connecting plate 31 on the right, and the left end of the folding rack 34 on the rear side of the base 21 of the second seat 4 is fixedly connected to the connecting plate 31 on the left.

[0044] When the driven gear 35 inside the first seat 3 rotates counterclockwise (from a top-down perspective), it drives the two folding racks 34 inside the first seat 3 away from each other, and the two folding racks 34 inside the first seat 3 drive the two connecting plates 31 inside the first seat 3 away from each other, and the two connecting plates 31 inside the first seat 3 drive the two sets of chains 8 inside the first seat 3 away from each other.

[0045] When the driven gear 35 inside the second seat 4 rotates counterclockwise (from a top-down perspective), it drives the two folding racks 34 inside the second seat 4 to approach each other, and the two folding racks 34 inside the second seat 4 drive the two connecting plates 31 inside the second seat 4 to approach each other, and the two connecting plates 31 inside the second seat 4 drive the two sets of chains 8 inside the second seat 4 to approach each other.

[0046] When the driven gear 35 inside the first seat 3 rotates clockwise (from a top-down perspective), it drives the two folding racks 34 inside the first seat 3 to approach each other, and the two folding racks 34 inside the first seat 3 drive the two connecting plates 31 inside the first seat 3 to approach each other, and the two connecting plates 31 inside the first seat 3 drive the two sets of chains 8 inside the first seat 3 to approach each other.

[0047] When the driven gear 35 inside the second seat 4 rotates clockwise (from a top-down perspective), it drives the two folding racks 34 inside the second seat 4 away from each other, and the two folding racks 34 inside the second seat 4 drive the two connecting plates 31 inside the second seat 4 away from each other, and the two connecting plates 31 inside the second seat 4 drive the two sets of chains 8 inside the second seat 4 away from each other.

[0048] The first drive mechanism is disposed within the base 21 of the first seat 3 and includes a first driving gear 41 and a transmission gear 43. The first driving gear 41 and the transmission gear 43 are rotatably disposed within the connecting cavity of the base 21 of the first seat 3. The driven gear 35 and the first driving gear 41 are located on the front and rear sides of the transmission gear 43, respectively, and both the first driving gear 41 and the driven gear 35 mesh with the transmission gear 43. The first driving gear 41 meshes with a first rack 44.

[0049] The second driving mechanism is disposed within the base 21 of the second seat 4 and includes a second driving gear 51, a large gear 52, and a small gear 53. The second driving gear 51, large gear 52, and small gear 53 are rotatably disposed within the connecting cavity of the base 21 of the second seat 4. The large gear 52 is located above the small gear 53 and is fixedly connected to the small gear 53. The gear ratio between the large gear 52 and the small gear 53 is 2:1. The second driving gear 51 is located behind the large gear 52 and meshes with the large gear 52. The driven gear 35 is located in front of the small gear 53 and meshes with the small gear 53. The second driving gear 51 meshes with the second rack 42.

[0050] The first driving gear 41 and the second driving gear 51 have the same specifications, the transmission gear 43 and the large gear 52 have the same specifications, and the driven gear 35 inside the first seat 3 and the driven gear 35 inside the second seat 4 have the same specifications.

[0051] A first cover body 22 is provided on the outside of the base 21 of both the first seat 3 and the second seat 4. The first cover body 22 includes a triangular plate 65, a side plate 61, an inclined plate 62, a top plate 63, and a rear plate 64. A side plate 61 is provided on the left and right sides of the base 21, respectively. The side plates 61 are located in a vertical plane in the front-to-back direction. The two side plates 61 are fixedly connected to the two connecting plates 31 on the base 21, respectively. A avoidance groove is provided on each side plate 61, and the chain 8 on the connecting plate 31 extends to the outside of the side plate 61 through the avoidance groove. An inclined plate 62 is rotatably provided at the front end of each side plate 61. The rear ends of the two inclined plates 62 are hinged to the front ends of the two side plates 61, respectively, and the front ends of the two inclined plates 62 are hinged to each other. A top plate 63 is fixedly mounted on the top end of each side panel 61. One end of the top plate 63 is fixedly connected to the top end of the side panel 61, and the other end of the top plate 63 extends toward the other side panel 61. The top plates 63 on the two side panels 61 intersect with each other. A rear plate 64 is fixedly mounted on the rear end of each side panel 61. One end of the rear plate 64 is fixedly connected to the rear end of the side panel 61, and the other end of the rear plate 64 extends toward the other side panel 61. A horizontal triangular plate 65 is fixedly mounted above the front end of the base 21, located above the two inclined plates 62.

[0052] A fixing groove is provided on each side of the base 21 of the two third seats 10 that are close to each other, and a connecting plate 31 is fixedly provided inside the fixing groove. The connecting plate 31 is a square plate structure extending forward and backward. Sprockets 32 are provided on both sides of the front and rear of the upper end face of the connecting plate 31, and the chain 8 is provided between the two sprockets 32.

[0053] A second cover body 23 is fixedly provided on the outside of the base 21 of the third seat 10. The front end of the second cover body 23 is set as a triangular structure. An avoidance groove is respectively provided on the side wall of the two second cover bodies 23 close to each other. The chain 8 on the connecting plate 31 on the base 21 of the third seat 10 extends to the outside of the second cover body 23 through the avoidance groove.

[0054] The working principle of the present invention is:

[0055] When a corn harvester is operating in the field, the sensor system installed in the front center of the harvester body 1 begins operating. The visual sensor uses image recognition technology to continuously collect image information of corn plants 11. By analyzing the arrangement and spacing characteristics of the corn plants 11 in the image, it determines the corn planting method. The laser sensor emits a laser beam toward the corn plants 11 and receives the reflected laser signal. Based on the laser propagation time, it accurately calculates the distance between the harvester and the corn plants 11, thereby determining the position of the corn rows. The ultrasonic sensor transmits and receives ultrasonic waves, utilizing the properties of sound waves propagating through air and reflecting off obstacles, to detect the position of the corn rows and surrounding obstacles. These three sensors work together and fuse data to determine whether the current planting method is wide-narrow row planting or evenly spaced row planting, thereby triggering subsequent automatic row adjustment actions.

[0056] like Figure 12 As shown, when it is necessary to harvest the corn plants 11 planted in equal row spacing:

[0057] For corn plants 11 planted in equal rows, the spacing between two adjacent rows of corn plants 11 is 60 cm. The distance between two first plants 3, the distance between an adjacent first plant 3 and a second plant 4, and the distance between an adjacent second plant 4 and a third plant 10 are all kept equal. Thus, an equal-spaced harvesting zone is formed between two first plants 3, an equal-spaced harvesting zone is formed between adjacent first plants 3 and second plants 4, and an equal-spaced harvesting zone is formed between adjacent second plants 4 and third plants 10. The widths of the five equal-spaced harvesting zones are all kept equal and set to 63 cm. The five equal-spaced harvesting zones are used to harvest the five equal-spaced rows of corn plants 11.

[0058] like Figure 13 As shown, when it is necessary to adjust the harvesting of corn plants 11 planted in equal row spacing to harvesting of corn plants 11 planted in wide and narrow rows:

[0059] For corn plants 11 planted in a wide-narrow row pattern, the spacing between the two rows of corn plants 11 on either side of the wide row is 100 cm, and the spacing between the two rows of corn plants 11 on either side of the narrow row is 30 cm. To accommodate the harvesting requirements of corn plants 11 planted in a wide-narrow row pattern, the spacing between different rows needs to be adjusted, and the widths of the first and second rows 3 and 4 also need to be adjusted.

[0060] The motor drives the drive shaft 5 in forward rotation, which moves the two first seats 3 away from each other, the two second seats 4 toward each other, and the two third seats 10 toward each other. Because the first, second, and third seats 3, 4, and 10 are threadedly connected to threaded sections of different pitches on the drive shaft 5, the first, second, and third seats 3, 4, and 10 move different distances: the first seat 3 moves 3.5 centimeters, the second seat 4 moves 26.5 centimeters, and the third seat 10 moves 47.5 centimeters. Through adjustment, the distance between two first seats 3 increases, the distance between adjacent first seats 3 and second seats 4 decreases, and the distance between adjacent second seats 4 and third seats 10 decreases, until the distance between the first seat 3 and second seat 4 equals the distance between the second seat 4 and third seat 10. This creates a narrow harvesting area between adjacent first seats 3 and second seats 4, and a narrow harvesting area between adjacent second seats 4 and third seats 10. The area between two adjacent first seats 3 is no longer a harvesting area. In this way, the corn harvester is adjusted from five 63 cm wide equidistant harvesting areas to four 33 cm wide narrow row harvesting areas. Each narrow row harvesting area harvests a row of corn plants 11 between the narrow row and the wide row. A total of four rows of corn plants 11 can be harvested simultaneously.

[0061] During the movement of the first seat 3, the first driving gear 41 inside the base 21 of the first seat 3 is always engaged with the first rack 44. Under the action of the first rack 44, the first driving gear 41 starts to rotate clockwise (from a top-down perspective), and the first driving gear 41 drives the transmission gear 43 to rotate counterclockwise (from a top-down perspective). The transmission gear 43 drives the driven gear 35 inside the base 21 of the first seat 3 to rotate clockwise (from a top-down perspective). The driven gear 35 inside the base 21 of the first seat 3 drives the two folding racks 34 inside the first seat 3 to approach each other. The two folding racks 34 inside the first seat 3 drive the two connecting plates 31 inside the first seat 3 to approach each other. The two connecting plates 31 inside the first seat 3 drive the two sets of chains 8 inside the first seat 3 and the two first covers 22 of the first seat 3 to approach each other, so that the width of the two first seats 3 becomes narrower.

[0062] During the movement of the second seat 4, the second driving gear 51 inside the base 21 of the second seat 4 is always engaged with the second rack 42. Under the action of the second rack 42, the second driving gear 51 starts to rotate counterclockwise (from a top-down perspective), and the second driving gear 51 drives the large gear 52 and the small gear 53 to rotate clockwise (from a top-down perspective). The small gear 53 drives the driven gear 35 inside the base 21 of the second seat 4 to rotate counterclockwise (from a top-down perspective). The driven gear 35 inside the base 21 of the second seat 4 drives the two folding racks 34 inside the second seat 4 to approach each other. The two folding racks 34 inside the second seat 4 drive the two connecting plates 31 inside the second seat 4 to approach each other. The two connecting plates 31 inside the second seat 4 drive the two sets of chains 8 inside the second seat 4 and the two first covers 22 of the second seat 4 to approach each other, so that the width of the two second seats 4 becomes narrower.

[0063] Since the pitch ratio of the first rack 44 to the second rack 42 is 14:53, and the ratio of the moving distance of the first seat 3 to the moving distance of the second seat 4 is 7:53, the rotation speed of the second driving gear 51 is twice that of the first driving gear 41. The first driving gear 41 directly drives the driven gear 35 inside the first seat 3 to rotate through the transmission gear 43, and the second driving gear 51 drives the driven gear 35 inside the second seat 4 to rotate through the fixed large gear 52 and small gear 53. By setting the gear ratio of the large gear 52 to the small gear 53 to 2:1, the rotation speeds of the driven gears 35 inside the first seat 3 and the second seat 4 remain equal, thereby ensuring that the sliding speeds of the folding racks 34 inside the first seat 3 and the second seat 4 are consistent, and thus ensuring that the self-width adjustment of the first seat 3 and the second seat 4 is always consistent.

[0064] When it is necessary to adjust the harvesting of corn plants 11 planted in wide and narrow rows to harvesting corn plants 11 planted in equal row spacing:

[0065] The motor controls the drive shaft 5 to rotate in the opposite direction, driving the two first seats 3 toward each other, the two second seats 4 away from each other, and the two third seats 10 away from each other. Because the first seats 3, second seats 4, and third seats 10 are threadedly connected to threaded sections of different pitches on the drive shaft 5, the distances moved by the first seats 3, second seats 4, and third seats 10 are unequal. Through adjustment, the distance between two first seats 3 decreases, the distance between adjacent first seats 3 and second seats 4 increases, and the distance between adjacent second seats 4 and third seats 10 increases, and the distances between two first seats 3, between adjacent first seats 3 and second seats 4, and between adjacent second seats 4 and third seats 10 all remain equal. This re-forms an equidistant harvesting zone between the two first seats 3, between adjacent first seats 3 and second seats 4, and between adjacent second seats 4 and third seats 10. Five equidistant harvesting zones, each 63 cm wide, are used to harvest five equally spaced rows of corn plants 11.

[0066] During the movement of the first seat 3 and the second seat 4, the first drive mechanism and the second drive mechanism run in the opposite direction relative to the last adjustment, so that the folding racks 34 inside the first seat 3 and the second seat 4 move away from each other, and the width of the first seat 3 and the second seat 4 becomes wider again, while the width adjustment of the first seat 3 and the second seat 4 remains consistent.

[0067] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. An automatic row alignment mechanism for a corn harvester header, characterized by: The present invention comprises a harvester body (1), a cutting platform (2) is installed at the front end of the harvester body (1), a first seat (3), a second seat (4) and a third seat (10) are slidably arranged inside the cutting platform (2), a drive shaft (5) is rotatably arranged inside the cutting platform (2), a first rack (44) and a second rack (42) are fixedly arranged inside the cutting platform (2), a first thread segment (6), a second thread segment (7) and a third thread segment (9) with different pitches are arranged on the outside of the drive shaft (5), wherein the first seat (3) is screwed to the first thread segment (6), the second seat (4) is screwed to the second thread segment (7), and the third seat (10) is screwed to the third thread segment (9), and the first seat (3), the second seat (4) and the third seat (10) all include a base (21), and at the bottom of the first seat (3) and the second seat (4) Two left-right symmetrical connecting plates (31) are slidably provided on each seat (21), a connecting plate (31) is fixedly provided on the base (21) of the third seat (10), and a group of chains (8) are provided on each connecting plate (31); a first driving mechanism is provided inside the first seat (3), and a second driving mechanism is provided inside the second seat (4); the first driving mechanism is connected to the two connecting plates (31) and the first rack (44) inside the first seat (3), and the second driving mechanism is connected to the two connecting plates (31) and the second rack (42) inside the second seat (4); the first driving mechanism drives the two connecting plates (31) inside the first seat (3) to move closer to or farther away from each other, and the second driving mechanism drives the two connecting plates (31) inside the second seat (4) to move closer to or farther away from each other.

2. The automatic row alignment mechanism for a corn harvester header according to claim 1, characterized in that: The cutting table (2) is a U-shaped plate-like structure with a U-shaped opening facing forward. A mounting groove is provided on the inner wall of the rear side of the cutting table (2), and the drive shaft (5) is rotatably provided inside the mounting groove. The first rack (44) and the second rack (42) are both fixedly provided on the inner wall of the rear side of the cutting table (2). The first rack (44) and the second rack (42) are both horizontally provided in the left-right direction. The pitch ratio of the first rack (44) to the second rack (42) is 14:

53.

3. The automatic row alignment mechanism for a corn harvester header according to claim 1, characterized in that: A motor is fixedly arranged on the cutting table (2), and the output shaft of the motor is connected to the driving shaft (5); two first thread segments (6), two second thread segments (7) and two third thread segments (9) are arranged on the driving shaft (5); the two first thread segments (6) are symmetrically arranged at the middle of the driving shaft (5), the two second thread segments (7) are symmetrically arranged on the left and right sides of the two first thread segments (6), and the two third thread segments (9) are symmetrically arranged on the left and right sides of the two second thread segments (7); the two first thread segments (6) have the same pitch and opposite rotation directions; the two second thread segments (7) have the same pitch and opposite rotation directions; the two third thread segments (9) have the same pitch and opposite rotation directions; the first thread segment (6) and the second thread segment (7) located on the same side have opposite rotation directions, and the second thread segment (7) and the third thread segment (9) located on the same side have the same rotation direction; the pitch ratio among the first thread segment (6), the second thread segment (7) and the third thread segment (9) is 7:53:

9.

4. The automatic row alignment mechanism for a corn harvester header according to claim 3, characterized in that: Two first seats (3), two second seats (4) and two third seats (10) are slidably arranged inside the cutting table (2). The rear ends of the bases (21) of the first seats (3), the second seats (4) and the third seats (10) are fixedly provided with a screw block. The screw blocks at the rear ends of the bases (21) of the two first seats (3) are screwed to the two first thread segments (6) respectively, the screw blocks at the rear ends of the bases (21) of the two second seats (4) are screwed to the two second thread segments (7) respectively, and the screw blocks at the rear ends of the bases (21) of the two third seats (10) are screwed to the two third thread segments (9) respectively.

5. The automatic row alignment mechanism for a corn harvester header according to claim 4, characterized in that: A sliding groove is provided on the left and right sides of the base (21) of the first seat (3) and the second seat (4), respectively, and the connecting plates (31) on the left and right sides are respectively slidably provided inside the sliding grooves on both sides; a connecting cavity is provided inside the base (21), and the connecting cavity is connected to the sliding grooves on the left and right sides; sprockets (32) are provided on both the front and rear sides of the upper end of the connecting plate (31), and the chain (8) is provided between the two sprockets (32); a folding rack (34) is fixedly provided on the side where the two connecting plates (31) are close to each other, and the folding rack (34) is provided along the left and right directions, and the two folding racks (34) are both extended into the connecting cavity of the base (21); a driven gear (35) is rotatably provided inside the connecting cavity of the base (21), and the two folding racks (34) are respectively located on the front and rear sides of the driven gear (35) and are both meshed with the driven gear (35).

6. The automatic row alignment mechanism for a corn harvester header according to claim 5, characterized in that: The left end of the folding rack (34) on the front side of the base (21) of the first seat (3) is fixedly connected to the left connecting plate (31), and the right end of the folding rack (34) on the rear side of the base (21) of the first seat (3) is fixedly connected to the right connecting plate (31); the right end of the folding rack (34) on the front side of the base (21) of the second seat (4) is fixedly connected to the right connecting plate (31), and the left end of the folding rack (34) on the rear side of the base (21) of the second seat (4) is fixedly connected to the left connecting plate (31).

7. The automatic row alignment mechanism for a corn harvester header according to claim 6, characterized in that: The first driving mechanism is arranged inside the base (21) of the first seat (3), and the first driving mechanism includes a first driving gear (41) and a transmission gear (43); the first driving gear (41) and the transmission gear (43) are rotatably arranged inside the connecting cavity of the base (21) of the first seat (3), the driven gear (35) and the first driving gear (41) are respectively located on the front and rear sides of the transmission gear (43), and the first driving gear (41) and the driven gear (35) are both meshed with the transmission gear (43); the first driving gear (41) is meshed with the first rack (44).

8. The automatic row alignment mechanism for a corn harvester header according to claim 6, characterized in that: The second driving mechanism is arranged inside the base (21) of the second seat (4), and the second driving mechanism includes a second driving gear (51), a large gear (52), and a small gear (53); the second driving gear (51), the large gear (52), and the small gear (53) are rotatably arranged inside the connecting cavity of the base (21) of the second seat (4), wherein the large gear (52) is located above the small gear (53), and the large gear (52) and the small gear (53) are fixedly connected, and the gear ratio of the large gear (52) to the small gear (53) is 2:1; The second driving gear (51) is located at the rear side of the large gear (52) and meshes with the large gear (52), the driven gear (35) is located at the front side of the small gear (53) and meshes with the small gear (53), and the second driving gear (51) meshes with the second rack (42).

9. The automatic row alignment mechanism for a corn harvester header according to claim 1, characterized in that: A first cover body (22) is provided on the outside of the base (21) of the first seat (3) and the second seat (4); the first cover body (22) includes a triangular plate (65), a side plate (61), an inclined plate (62), a top plate (63), and a rear plate (64); a side plate (61) is provided on the left and right sides of the base (21), and the two side plates (61) are fixedly connected to the two connecting plates (31) on the base (21); a avoidance groove is provided on each side plate (61), and the chain (8) on the connecting plate (31) extends to the outside of the side plate (61) through the avoidance groove; an inclined plate (62) is rotatably provided at the front end of each side plate (61), and the rear ends of the two inclined plates (62) are respectively connected to the front ends of the two side plates (61). The ends are hinged, and the front ends of the two inclined plates (62) are hinged to each other; a top plate (63) is fixedly provided at the upper end of each side plate (61), one end of the top plate (63) is fixedly connected to the upper end of the side plate (61), and the other end of the top plate (63) extends toward the other side plate (61), and the top plates (63) on the two side plates (61) intersect with each other; a rear plate (64) is fixedly provided at the rear end of each side plate (61), one end of the rear plate (64) is fixedly connected to the rear end of the side plate (61), and the other end of the rear plate (64) extends toward the other side plate (61); a horizontal triangular plate (65) is fixedly provided above the front end of the base (21), and the triangular plate (65) is located above the two inclined plates (62).

10. The automatic row alignment mechanism for a corn harvester header according to claim 1, characterized in that: A fixing groove is provided on each side of the base (21) of the two third seats (10) close to each other, and the connecting plate (31) is fixedly provided inside the fixing groove. Sprockets (32) are provided on both the front and rear sides of the upper end of the connecting plate (31), and the chain (8) is provided between the two sprockets (32); a second cover (23) is fixedly provided on the outer side of the base (21) of the third seat (10), and the front end of the second cover (23) is provided with a triangular structure. An avoidance groove is provided on the side wall of the two second covers (23) close to each other, and the chain (8) on the connecting plate (31) on the base (21) of the third seat (10) extends to the outer side of the second cover (23) through the avoidance groove.

Images